diff --git a/src/routes/resources.ts b/src/routes/resources.ts
index 09ee761..ee9d0e0 100644
--- a/src/routes/resources.ts
+++ b/src/routes/resources.ts
@@ -563,13 +563,13 @@ export default async function resourceRoutes(server: FastifyInstance) {
                 if (searchCols.length === 0) {
                     // Fallback: Durchsuche alle String-Felder der Hauptebene
                     return Object.values(row).some(val =>
-                        val?.toString().toLowerCase().includes(searchTerm)
+                         JSON.stringify(val).toString().toLowerCase().includes(searchTerm)
                     );
                 }
 
                 return searchCols.some(col => {
                     const value = getNestedValue(row, col);
-                    return value?.toString().toLowerCase().includes(searchTerm);
+                    return JSON.stringify(value).toLowerCase().includes(searchTerm);
                 });
             });